Finding the Fourth Proportional to 1,224.03, 1,690.56 and 830.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.03 : 1,690.56 = 830.37 : x
2. Step 2: Convert to fraction form
   1,224.03/1,690.56 = 830.37/x
3. Step 3: Cross multiply
   1,224.03x = 1,690.56 × 830.37
4. Step 4: Simplify right side
   1,224.03x = 1,403,790.31
5. Step 5: Solve for x
   x = 1,403,790.31/1,224.03
6. Step 6: Final answer
   x = 1,146.86